I've wondered about this aspect of aging, at least for myself. As a yute, many times I listened to the Bob Dylan song, "My Back Pages." The refrain of that song is, "But I was so much older then, I'm younger than that now."
Although I didn't get it at the time, now I kinda do.
So today I don't know if I'm any wiser or have more wisdom, but I'm more open minded and willing to accept, as real, things I don't understand. I still question such things, but understand I may never understand. Maybe my Mom was right, she'd tell people I was an "old soul" and was never a kid. Maybe I'm going backwards.